National Vulnerability Database

National Vulnerability Database

CVE-2006-4759 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Current Description

PunBB 1.2.12 does not properly handle an avatar directory pathname ending in %00, which allows remote authenticated administrative users to upload arbitrary files and execute code, as demonstrated by a query to admin_options.php with an avatars_dir parameter ending in %00. NOTE: this issue was originally disputed by the vendor, but the dispute was withdrawn on 20060926.

Analysis Description

** DISPUTED ** PunBB 1.2.12 does not properly handle pathnames ending in %00, which allows remote authenticated administrative users to execute arbitrary code by modifying the name of a previously-uploaded avatar image file to contain a .php extension. NOTE: on 20060925, the vendor disputed the issue to CVE, saying "PunBB doesn't contain a directory called admin or a script called admin_board.php. The author of the original report probably thought PunBB was a fork of phpBB (which it is not)." The original disclosure is from a reliable known party, although the original researcher is not as well known. The original disclosure included an exploit for phpBB but not punBB, so the specific exploit vectors for punBB are not known. As of 20060925, CVE is not aware of any followup by the researcher/discloser and has no position regarding the dispute.

Evaluator Solution

Official Statement from PunBB (09/28/2006)

PunBB 1.2.13 has been released to fix this vulnerability. The updated version is available at http://punbb.org/downloads.php.

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